refactor(*): Break apart packages

system/ssh_key.go

@@ -0,0 +1,59 @@
+package system
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os/exec"
+	"strings"
+)
+
+// Add the provide SSH public key to the core user's list of
+// authorized keys
+func AuthorizeSSHKeys(user string, keysName string, keys []string) error {
+	for i, key := range keys {
+		keys[i] = strings.TrimSpace(key)
+	}
+
+	// join all keys with newlines, ensuring the resulting string
+	// also ends with a newline
+	joined := fmt.Sprintf("%s\n", strings.Join(keys, "\n"))
+
+	cmd := exec.Command("update-ssh-keys", "-u", user, "-a", keysName)
+	stdin, err := cmd.StdinPipe()
+	if err != nil {
+		return err
+	}
+
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		return err
+	}
+
+	stderr, err := cmd.StderrPipe()
+	if err != nil {
+		return err
+	}
+
+	err = cmd.Start()
+	if err != nil {
+		stdin.Close()
+		return err
+	}
+
+	_, err = io.WriteString(stdin, joined)
+	if err != nil {
+		return err
+	}
+
+	stdin.Close()
+	stdoutBytes, _ := ioutil.ReadAll(stdout)
+	stderrBytes, _ := ioutil.ReadAll(stderr)
+
+	err = cmd.Wait()
+	if err != nil {
+		return fmt.Errorf("Call to update-ssh-keys failed with %v: %s %s", err, string(stdoutBytes), string(stderrBytes))
+	}
+
+	return nil
+}